The Meritage Resort and Spa

The resort is at 875 Bordeaux Way in south Napa, off Highway 29. San Francisco International is about 55 miles and 80 minutes — the easiest luxury-tier airport run in the valley. Downtown Napa is 10 minutes, with a resort shuttle included in the fee.

North America's first fully underground spa — 12 treatment rooms, steam grottos, whirlpools, and copper water walls carved 40 feet down into the 22,000-sq-ft Estate Cave beneath the resort's hillside Cabernet. It opened in 2007 and remains the only cave spa experience in the US.

Spa Terra does not publish prices online — booking runs by phone or the reservation system. Expect roughly $200 for a 50-minute massage based on recent reference points, with weekend pricing higher, before the 22% service charge. Napa locals get 20% off treatments Monday–Thursday with ID.

Yes — 22%, with a disclosed split rare in this industry: 15% to your provider, 2% to support staff, 5% retained by the spa. Groups of ten or more pay 24%. The disclosure is admirable; the math still lands on your bill.

Yes — it operates as a full-service day spa, and the Napa-locals discount (20% off Monday–Thursday) makes midweek the local play. The spa is 18+, cashless, and books out on convention weekends; reserve ahead.

Yes — $49 plus tax per night, covering a bottle of wine on arrival, the downtown Napa shuttle, two bottled waters nightly, WiFi, fitness and yoga classes, and the pools. Parking is separate: $15 self, $25 valet.

Very — and that is both the pitch and the caveat. Bowling, a family pool, seasonal programming, and food-hall dining suit kids well; convention crowds and event noise come with the package. The adults-only vineyard-view pool and the 18+ underground spa are the escape hatches.

Warm, dark, and genuinely atmospheric — steam grottos and water walls in real cave quiet, with no windows and phone-free calm. Guests consistently call the setting the reason to come. It is an experience piece: the treatment quality is solid, the cave is what you remember.

December through February, when rooms drop toward $200–$350 — the most accessible entry point to any destination-grade spa experience in Napa. Peak harvest weekends run $450–$700. Convention calendars move rates more than seasons here; check event schedules before booking.

The honest play: book the treatment, skip the room upgrade math. Spa Terra is the draw; the resort around it is a competent convention campus with recurring complaints about event noise and checked-out service at peak. "Splurge treatment, budget bed" is the strategy this property was built for.

Different products. Calistoga sells hot mineral water and mud from the ground; Spa Terra sells the cave — atmosphere, steam grottos, and novelty no thermal spring can match. There is no geothermal source here. Soak-first travelers go north; experience-collectors book the cave.

Yes — a $25M renovation completed in April 2024 refreshed rooms and public spaces across the campus. The spa's cave setting predates and outlasts renovation cycles; the 2007 build remains the bones of the experience.